If you smoke one, until the End of the Scene, when you are attacked, roll your weapons damage dice. If any of your dice match the attackers damage dice, cancel matching pairs.

Example:

You are hit by an enemy that deals 3d6+3 dmg, it rolls 1+4+5(dice) + 6(fixed bonus) = 16. Your standard weapon deals 2d10+4 dmg, so you roll 2d10 and get 4 and 9. The enemies 4 and your 4 cancel out, so you take 1+5(dice) + 6(fixed bonus) = 12 dmg

Enemy RollYour RollCancelationFinal Damage
1 + 4 + 54 + 94 41 + 5
2 + 2 + 3 + 32 + 32 2 | 3 32 + 3
6 + 6 + 7 + 96 + 6 + 66 6 | 6 67 + 9